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Grid infrastructure β€Ί Connection queue β€Ί Nuclear

NUCLEAR Β· NGET

Sizewell B

Sizewell B is a 1.2 GW nuclear project built and connected, connecting to the National Grid (England & Wales) network at Sizewell 400kV Substation. The connection agreement is held by EDF Energy Nuclear Generation Limited.

Project stageOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. Operating (current stage)
  5. Closed (not yet reached)

Connection details

NESO project number
PRO-000144
Customer
EDF Energy Nuclear Generation Limited
Technology
Nuclear
Total capacity
1.2 GW
Already connected
1.2 GW
Connection site
Sizewell 400kV Substation
Transmission owner
National Grid (England & Wales)
Connection type
Direct connection to the transmission network
NESO project status
Built

Connection site

The marker shows the connection substation, not the project itself, with the transmission network around it.

Projects connecting near Sizewell Β· Grid map

Other projects at Sizewell 400kV Substation

Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem